U.S. Military Keys

During WW1 & WW2, many different keys were made for the U.S. Navy and Army Signal Corps. Navy keys can be identified by a prefix that begins with the letter "C". For example, CAG was General Radio, CJB was JH Bunnell, CTE was Telephonics Corp, etc.

Army Signal Corps Keys were known as "J-Series" keys because they identified their keys by a J-number ranging from J-2 through J-51 (although not every J-number actually exists)

Below are pictures of many of the Navy and Signal Corps keys.

(Click the thumbnails below to view a larger picture):


Signal Corps J-2 Key. Has Larger Contacts Like a Spark Key J-3a Key by LS Brach. Used in a WW1 Induction Telegraph Set (kd2uj.com) J-3a Key Lever Folds Back to Fit Inside Field Set Box (kd2uj.com) J-4 Silenced Instrument Key With Winker Lamp
J-5a Flameproof Key Different Version of J-5 Key. Part of Type 48 Wireless Set J-6 Key by LS Brach Close-up of Brach Name Stamp
J-7 Key With Winker Lamp (kd2uj.com) J-12 Key J-37 Key J-38 Morse Code Training Key
TG5-A Field Telegraph Set Using J-41 Key J-44 Key. Basically a J-37 With a Circuit Closer Switch (kd2uj.com) J-47 Key, Which is a J-37 on a Bakelite Base J-48 Key
J-51 Vietnam Era Field Signal Light Key. Works by Squeezing the Handles Together. CMI-26003 Navy Flameproof Key (kd2uj.com) A Different Type of Navy Flameproof Key. Maker Unknown CLT-26012 Navy Key. Has a Slot to Insert a Bug Wedge (kd2uj.com)
Navy Waterproof Key. Uses a CJB-26001 Key Close-Up of the Key RT-6 Spy Radio Transmitter Used by the CIA. Made by Motorola The RT-6 Transmitter Includes a Tiny Telegraph Key That Folds Out From Inside the Unit





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You can reach me at telegraphdude@comcast.net